539348 - "ASSERTION: curPos.x not a multiple of device pixels" dragging rotated scrollbar

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Jesse Ruderman]

1. Load https://bug507563.bugzilla.mozilla.org/attachment.cgi?id=391797
2. Drag the scrollbar thumb around at random, picking it up and letting it go several times.

Result:

###!!! ASSERTION: curPos.x not a multiple of device pixels: 'curPosDevPx.x*appUnitsPerDevPixel == curPos.x', file /Users/jruderman/central/layout/generic/nsGfxScrollFrame.cpp, line 1763

This assertion was added in rev 4ccff5df452c: "Bug 526394. Part 31: Move scroll implementation into nsGfxScrollFrame."

Comment 1

[Jesse Ruderman]

Attachment: another testcase

This testcase triggers the assertion on load, but only at certain window sizes :/

Comment 2

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Can't seem to reproduce on Linux. Maybe Mac only.

Comment 3

[Jesse Ruderman]

Zooming in attachment 266235 [details] also triggers this assertion.  And bug 561676 is an orange that might be related to this assertion

Comment 4

[:Cykesiopka]

Bug 681192 Part 1 removed the assertion:
https://hg.mozilla.org/mozilla-central/rev/9e1f8d125acc